Question

Dau 45 de puncte! Exercitile:6,7. Metoda Algebrica!

Answer 1

6. trebuie sa faci 45x26=1170 
acesta il imparti la 2 
1170:2=585 
iar 585*3 =    1755

Answer 2

ex 6)
45x26=1170
a=1170:2=585
2a+3a=585x5
5a=2925 bilete vandute

ex 7)
2a+2r+2d=90+79+97=266
a+d+r=266:2=133


a+d/.........../90
a+r/......../79
d>r cu 90-79=11
d+r=97
97-11=80
86:2=43
d>a cu 18
3d=133+11+18=162
162:3=54

d=54
a=54-18=36
r=54-11=43

V:54+36+43=133
133x2=266

radu=43
diana=43+11=54 lei
anca=90-54=36 lei

V:2x(43+54+35)=